it913x.c 9.9 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * ITE IT913X silicon tuner driver
  4. *
  5. * Copyright (C) 2011 Malcolm Priestley (tvboxspy@gmail.com)
  6. * IT9137 Copyright (C) ITE Tech Inc.
  7. */
  8. #include "it913x.h"
  9. #include <linux/platform_device.h>
  10. #include <linux/regmap.h>
  11. struct it913x_dev {
  12. struct platform_device *pdev;
  13. struct regmap *regmap;
  14. struct dvb_frontend *fe;
  15. u8 chip_ver:2;
  16. u8 role:2;
  17. u16 xtal;
  18. u8 fdiv;
  19. u8 clk_mode;
  20. u32 fn_min;
  21. bool active;
  22. };
  23. static int it913x_init(struct dvb_frontend *fe)
  24. {
  25. struct it913x_dev *dev = fe->tuner_priv;
  26. struct platform_device *pdev = dev->pdev;
  27. int ret;
  28. unsigned int utmp;
  29. u8 iqik_m_cal, nv_val, buf[2];
  30. static const u8 nv[] = {48, 32, 24, 16, 12, 8, 6, 4, 2};
  31. unsigned long timeout;
  32. dev_dbg(&pdev->dev, "role %u\n", dev->role);
  33. ret = regmap_write(dev->regmap, 0x80ec4c, 0x68);
  34. if (ret)
  35. goto err;
  36. usleep_range(10000, 100000);
  37. ret = regmap_read(dev->regmap, 0x80ec86, &utmp);
  38. if (ret)
  39. goto err;
  40. switch (utmp) {
  41. case 0:
  42. /* 12.000 MHz */
  43. dev->clk_mode = utmp;
  44. dev->xtal = 2000;
  45. dev->fdiv = 3;
  46. iqik_m_cal = 16;
  47. break;
  48. case 1:
  49. /* 20.480 MHz */
  50. dev->clk_mode = utmp;
  51. dev->xtal = 640;
  52. dev->fdiv = 1;
  53. iqik_m_cal = 6;
  54. break;
  55. default:
  56. dev_err(&pdev->dev, "unknown clock identifier %d\n", utmp);
  57. goto err;
  58. }
  59. ret = regmap_read(dev->regmap, 0x80ed03, &utmp);
  60. if (ret)
  61. goto err;
  62. else if (utmp < ARRAY_SIZE(nv))
  63. nv_val = nv[utmp];
  64. else
  65. nv_val = 2;
  66. #define TIMEOUT 50
  67. timeout = jiffies + msecs_to_jiffies(TIMEOUT);
  68. while (!time_after(jiffies, timeout)) {
  69. ret = regmap_bulk_read(dev->regmap, 0x80ed23, buf, 2);
  70. if (ret)
  71. goto err;
  72. utmp = (buf[1] << 8) | (buf[0] << 0);
  73. if (utmp)
  74. break;
  75. }
  76. dev_dbg(&pdev->dev, "r_fbc_m_bdry took %u ms, val %u\n",
  77. jiffies_to_msecs(jiffies) -
  78. (jiffies_to_msecs(timeout) - TIMEOUT), utmp);
  79. dev->fn_min = dev->xtal * utmp;
  80. dev->fn_min /= (dev->fdiv * nv_val);
  81. dev->fn_min *= 1000;
  82. dev_dbg(&pdev->dev, "fn_min %u\n", dev->fn_min);
  83. /*
  84. * Chip version BX never sets that flag so we just wait 50ms in that
  85. * case. It is possible poll BX similarly than AX and then timeout in
  86. * order to get 50ms delay, but that causes about 120 extra I2C
  87. * messages. As for now, we just wait and reduce IO.
  88. */
  89. if (dev->chip_ver == 1) {
  90. #define TIMEOUT 50
  91. timeout = jiffies + msecs_to_jiffies(TIMEOUT);
  92. while (!time_after(jiffies, timeout)) {
  93. ret = regmap_read(dev->regmap, 0x80ec82, &utmp);
  94. if (ret)
  95. goto err;
  96. if (utmp)
  97. break;
  98. }
  99. dev_dbg(&pdev->dev, "p_tsm_init_mode took %u ms, val %u\n",
  100. jiffies_to_msecs(jiffies) -
  101. (jiffies_to_msecs(timeout) - TIMEOUT), utmp);
  102. } else {
  103. msleep(50);
  104. }
  105. ret = regmap_write(dev->regmap, 0x80ed81, iqik_m_cal);
  106. if (ret)
  107. goto err;
  108. ret = regmap_write(dev->regmap, 0x80ec57, 0x00);
  109. if (ret)
  110. goto err;
  111. ret = regmap_write(dev->regmap, 0x80ec58, 0x00);
  112. if (ret)
  113. goto err;
  114. ret = regmap_write(dev->regmap, 0x80ec40, 0x01);
  115. if (ret)
  116. goto err;
  117. dev->active = true;
  118. return 0;
  119. err:
  120. dev_dbg(&pdev->dev, "failed %d\n", ret);
  121. return ret;
  122. }
  123. static int it913x_sleep(struct dvb_frontend *fe)
  124. {
  125. struct it913x_dev *dev = fe->tuner_priv;
  126. struct platform_device *pdev = dev->pdev;
  127. int ret, len;
  128. dev_dbg(&pdev->dev, "role %u\n", dev->role);
  129. dev->active = false;
  130. ret = regmap_bulk_write(dev->regmap, 0x80ec40, "\x00", 1);
  131. if (ret)
  132. goto err;
  133. /*
  134. * Writing '0x00' to master tuner register '0x80ec08' causes slave tuner
  135. * communication lost. Due to that, we cannot put master full sleep.
  136. */
  137. if (dev->role == IT913X_ROLE_DUAL_MASTER)
  138. len = 4;
  139. else
  140. len = 15;
  141. dev_dbg(&pdev->dev, "role %u, len %d\n", dev->role, len);
  142. ret = regmap_bulk_write(dev->regmap, 0x80ec02,
  143. "\x3f\x1f\x3f\x3e\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
  144. len);
  145. if (ret)
  146. goto err;
  147. ret = regmap_bulk_write(dev->regmap, 0x80ec12, "\x00\x00\x00\x00", 4);
  148. if (ret)
  149. goto err;
  150. ret = regmap_bulk_write(dev->regmap, 0x80ec17,
  151. "\x00\x00\x00\x00\x00\x00\x00\x00\x00", 9);
  152. if (ret)
  153. goto err;
  154. ret = regmap_bulk_write(dev->regmap, 0x80ec22,
  155. "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 10);
  156. if (ret)
  157. goto err;
  158. ret = regmap_bulk_write(dev->regmap, 0x80ec20, "\x00", 1);
  159. if (ret)
  160. goto err;
  161. ret = regmap_bulk_write(dev->regmap, 0x80ec3f, "\x01", 1);
  162. if (ret)
  163. goto err;
  164. return 0;
  165. err:
  166. dev_dbg(&pdev->dev, "failed %d\n", ret);
  167. return ret;
  168. }
  169. static int it913x_set_params(struct dvb_frontend *fe)
  170. {
  171. struct it913x_dev *dev = fe->tuner_priv;
  172. struct platform_device *pdev = dev->pdev;
  173. struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  174. int ret;
  175. unsigned int utmp;
  176. u32 pre_lo_freq, t_cal_freq;
  177. u16 iqik_m_cal, n_div;
  178. u8 u8tmp, n, l_band, lna_band;
  179. dev_dbg(&pdev->dev, "role=%u, frequency %u, bandwidth_hz %u\n",
  180. dev->role, c->frequency, c->bandwidth_hz);
  181. if (!dev->active) {
  182. ret = -EINVAL;
  183. goto err;
  184. }
  185. if (c->frequency <= 74000000) {
  186. n_div = 48;
  187. n = 0;
  188. } else if (c->frequency <= 111000000) {
  189. n_div = 32;
  190. n = 1;
  191. } else if (c->frequency <= 148000000) {
  192. n_div = 24;
  193. n = 2;
  194. } else if (c->frequency <= 222000000) {
  195. n_div = 16;
  196. n = 3;
  197. } else if (c->frequency <= 296000000) {
  198. n_div = 12;
  199. n = 4;
  200. } else if (c->frequency <= 445000000) {
  201. n_div = 8;
  202. n = 5;
  203. } else if (c->frequency <= dev->fn_min) {
  204. n_div = 6;
  205. n = 6;
  206. } else if (c->frequency <= 950000000) {
  207. n_div = 4;
  208. n = 7;
  209. } else {
  210. n_div = 2;
  211. n = 0;
  212. }
  213. ret = regmap_read(dev->regmap, 0x80ed81, &utmp);
  214. if (ret)
  215. goto err;
  216. iqik_m_cal = utmp * n_div;
  217. if (utmp < 0x20) {
  218. if (dev->clk_mode == 0)
  219. iqik_m_cal = (iqik_m_cal * 9) >> 5;
  220. else
  221. iqik_m_cal >>= 1;
  222. } else {
  223. iqik_m_cal = 0x40 - iqik_m_cal;
  224. if (dev->clk_mode == 0)
  225. iqik_m_cal = ~((iqik_m_cal * 9) >> 5);
  226. else
  227. iqik_m_cal = ~(iqik_m_cal >> 1);
  228. }
  229. t_cal_freq = (c->frequency / 1000) * n_div * dev->fdiv;
  230. pre_lo_freq = t_cal_freq / dev->xtal;
  231. utmp = pre_lo_freq * dev->xtal;
  232. if ((t_cal_freq - utmp) >= (dev->xtal >> 1))
  233. pre_lo_freq++;
  234. pre_lo_freq += (u32) n << 13;
  235. /* Frequency OMEGA_IQIK_M_CAL_MID*/
  236. t_cal_freq = pre_lo_freq + (u32)iqik_m_cal;
  237. dev_dbg(&pdev->dev, "t_cal_freq %u, pre_lo_freq %u\n",
  238. t_cal_freq, pre_lo_freq);
  239. if (c->frequency <= 440000000) {
  240. l_band = 0;
  241. lna_band = 0;
  242. } else if (c->frequency <= 484000000) {
  243. l_band = 1;
  244. lna_band = 1;
  245. } else if (c->frequency <= 533000000) {
  246. l_band = 1;
  247. lna_band = 2;
  248. } else if (c->frequency <= 587000000) {
  249. l_band = 1;
  250. lna_band = 3;
  251. } else if (c->frequency <= 645000000) {
  252. l_band = 1;
  253. lna_band = 4;
  254. } else if (c->frequency <= 710000000) {
  255. l_band = 1;
  256. lna_band = 5;
  257. } else if (c->frequency <= 782000000) {
  258. l_band = 1;
  259. lna_band = 6;
  260. } else if (c->frequency <= 860000000) {
  261. l_band = 1;
  262. lna_band = 7;
  263. } else if (c->frequency <= 1492000000) {
  264. l_band = 1;
  265. lna_band = 0;
  266. } else if (c->frequency <= 1685000000) {
  267. l_band = 1;
  268. lna_band = 1;
  269. } else {
  270. ret = -EINVAL;
  271. goto err;
  272. }
  273. /* XXX: latest windows driver does not set that at all */
  274. ret = regmap_write(dev->regmap, 0x80ee06, lna_band);
  275. if (ret)
  276. goto err;
  277. if (c->bandwidth_hz <= 5000000)
  278. u8tmp = 0;
  279. else if (c->bandwidth_hz <= 6000000)
  280. u8tmp = 2;
  281. else if (c->bandwidth_hz <= 7000000)
  282. u8tmp = 4;
  283. else
  284. u8tmp = 6; /* 8000000 */
  285. ret = regmap_write(dev->regmap, 0x80ec56, u8tmp);
  286. if (ret)
  287. goto err;
  288. /* XXX: latest windows driver sets different value (a8 != 68) */
  289. ret = regmap_write(dev->regmap, 0x80ec4c, 0xa0 | (l_band << 3));
  290. if (ret)
  291. goto err;
  292. ret = regmap_write(dev->regmap, 0x80ec4d, (t_cal_freq >> 0) & 0xff);
  293. if (ret)
  294. goto err;
  295. ret = regmap_write(dev->regmap, 0x80ec4e, (t_cal_freq >> 8) & 0xff);
  296. if (ret)
  297. goto err;
  298. ret = regmap_write(dev->regmap, 0x80011e, (pre_lo_freq >> 0) & 0xff);
  299. if (ret)
  300. goto err;
  301. ret = regmap_write(dev->regmap, 0x80011f, (pre_lo_freq >> 8) & 0xff);
  302. if (ret)
  303. goto err;
  304. return 0;
  305. err:
  306. dev_dbg(&pdev->dev, "failed %d\n", ret);
  307. return ret;
  308. }
  309. static const struct dvb_tuner_ops it913x_tuner_ops = {
  310. .info = {
  311. .name = "ITE IT913X",
  312. .frequency_min_hz = 174 * MHz,
  313. .frequency_max_hz = 862 * MHz,
  314. },
  315. .init = it913x_init,
  316. .sleep = it913x_sleep,
  317. .set_params = it913x_set_params,
  318. };
  319. static int it913x_probe(struct platform_device *pdev)
  320. {
  321. struct it913x_platform_data *pdata = pdev->dev.platform_data;
  322. struct dvb_frontend *fe = pdata->fe;
  323. struct it913x_dev *dev;
  324. const struct platform_device_id *id = platform_get_device_id(pdev);
  325. int ret;
  326. char *chip_ver_str;
  327. dev = kzalloc(sizeof(struct it913x_dev), GFP_KERNEL);
  328. if (dev == NULL) {
  329. ret = -ENOMEM;
  330. dev_err(&pdev->dev, "kzalloc() failed\n");
  331. goto err;
  332. }
  333. dev->pdev = pdev;
  334. dev->regmap = pdata->regmap;
  335. dev->fe = pdata->fe;
  336. dev->chip_ver = id->driver_data;
  337. dev->role = pdata->role;
  338. fe->tuner_priv = dev;
  339. memcpy(&fe->ops.tuner_ops, &it913x_tuner_ops,
  340. sizeof(struct dvb_tuner_ops));
  341. platform_set_drvdata(pdev, dev);
  342. if (dev->chip_ver == 1)
  343. chip_ver_str = "AX";
  344. else if (dev->chip_ver == 2)
  345. chip_ver_str = "BX";
  346. else
  347. chip_ver_str = "??";
  348. dev_info(&pdev->dev, "ITE IT913X %s successfully attached\n",
  349. chip_ver_str);
  350. dev_dbg(&pdev->dev, "chip_ver %u, role %u\n", dev->chip_ver, dev->role);
  351. return 0;
  352. err:
  353. dev_dbg(&pdev->dev, "failed %d\n", ret);
  354. return ret;
  355. }
  356. static int it913x_remove(struct platform_device *pdev)
  357. {
  358. struct it913x_dev *dev = platform_get_drvdata(pdev);
  359. struct dvb_frontend *fe = dev->fe;
  360. dev_dbg(&pdev->dev, "\n");
  361. memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
  362. fe->tuner_priv = NULL;
  363. kfree(dev);
  364. return 0;
  365. }
  366. static const struct platform_device_id it913x_id_table[] = {
  367. {"it9133ax-tuner", 1},
  368. {"it9133bx-tuner", 2},
  369. {},
  370. };
  371. MODULE_DEVICE_TABLE(platform, it913x_id_table);
  372. static struct platform_driver it913x_driver = {
  373. .driver = {
  374. .name = "it913x",
  375. .suppress_bind_attrs = true,
  376. },
  377. .probe = it913x_probe,
  378. .remove = it913x_remove,
  379. .id_table = it913x_id_table,
  380. };
  381. module_platform_driver(it913x_driver);
  382. MODULE_DESCRIPTION("ITE IT913X silicon tuner driver");
  383. MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
  384. MODULE_LICENSE("GPL");